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3 years ago

The movie starts at 7:20 p.m. It will run for 1 hour and 40 minutes. At what time will the movie be over?

Mathematics

2 answers:

babymother [125]3 years ago

8 0

Answer:

the movie will end at 9 btw thanks for helping me out i really appereciate it this is a little gift in return for helping me

Ganezh [65]3 years ago

3 0

Answer:9:00 pm

Step-by-step explanation:

Start time: 7:20pm

Duration of movie: 1 hour 40minutes

End time= 7:20 + 1:40

= 8:60 = 9:00pm

60 minutes make 1 hour.

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A trucking firm has a large inventory of spare parts that have been in storage for a long time. It knowsthat some proportion of

Debora [2.8K]

Answer:

$0.1546\leq \widehat{p}\leq 0.3513$

Step-by-step explanation:

The firm tests 75 parts, and finds that 0.25 of them are notusable

n = 75

x = 0.25 \times 75 = 18.75≈19

$\widehat{p}=\frac{x}{n}$

$\widehat{p}=\frac{19}{75}$

$\widehat{p}=0.253$

Confidence level = 95%

So, Z_\alpha at 95% = 1.96

Formula of confidence interval of one sample proportion:

$=\widehat{p}-Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}\leq \widehat{p}\leq \widehat{p}+Z_\alpha \sqrt{\frac{\widehat{p}(1-\widehat{p}}{n}}$

$=0.253-(1.96)\sqrt{\frac{0.253(1-0.253)}{75}}\leq \widehat{p}\leq0.253+(1.96)\sqrt{\frac{0.253(1-0.253}{75}}$

Confidence interval $=0.1546\leq \widehat{p}\leq 0.3513$

7 0

3 years ago

. A triangle has side lengths of 8, 7, and 14. To the nearest tenth of a degree find the measure of the angle opposite the side

4vir4ik [10]

Given:

The measure of three sides of a triangle are 8, 7 and 14.

To find:

The measure of the angle opposite the side of length 8.

Solution:

According to the Law of Cosine:

$\cos A=\dfrac{b^2+c^2-a^2}{2bc}$

Let a=8, b=7 and c=14, then by using Law of Cosine, we get

$\cos A=\dfrac{7^2+14^2-8^2}{2(7)(14)}$

$\cos A=\dfrac{49+196-64}{196}$

$\cos A=\dfrac{181}{196}$

Taking cos inverse on both sides.

$A=\cos^{-1}\dfrac{181}{196}$

$A=22.561328$

$A\approx 22.6$

Therefore, the measure of the angle opposite the side of length 8 is 22.6 degrees.

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3 years ago

Help me plz asap if you can

Andrej [43]

Your answer for this is 17 hope i helped

8 0

3 years ago

Read 2 more answers

1/3 cup of flour is used to make 5 dinner rolls.

Sergio [31]

3 dozen = 36

1/3 ÷ x = 5 ÷ 36
1/3 × 36 = x × 5
12 = 5x
12/5 = x

12/5 cups of flour is needed

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3 years ago

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bija089 [108]

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3 years ago

The movie starts at 7:20 p.m. It will run for 1 hour and 40 minutes. At what time will the movie be over?​

The movie starts at 7:20 p.m. It will run for 1 hour and 40 minutes. At what time will the movie be over?